Release v2.53.0-pre1

What's Changed

• Bump version to 2.53.0-dev (on master) by @jtattermusch in #2067
• Improve error message with invalid headers by @JamesNK in #2068
• Fix .NET 6 trimming constraint constructor by @JamesNK in #2080
• Bump webpack from 5.75.0 to 5.76.0 in /examples/Browser/Server/wwwroot by @dependabot in #2073
• Fix unobserved exception when using a client interceptor by @JamesNK in #2082
• Change proxy detection to log a message by @JamesNK in #2087
• Update Grpc.Tools dependency to 2.53.0 by @jtattermusch in #2094
• Update version to 2.53.0-pre1 (on release branch) by @jtattermusch in #2095

Full Changelog: v2.52.0...v2.53.0-pre1